Your class scribbles notes as you lecture in your Peter-Pan-collared blouse, high-waisted trousers, and this chalkboard-green cardigan. From time to time, you pull a piece of fresh chalk from one of your knit cardi’s pockets and add to the formulas that fill the wall behind you. “Questions?” you ask, brushing a hint of chalk dust from your round-edged lapel. Hands go up as you pivot back around in your loafers, and you meet your eager students with an inspired smile.